Zynga‘s CityVille turns one tomorrow and it’s still the No. 1 game on Facebook.

With more than 10 million daily active users, the game has proven that a social game can still have a lot of staying power, even though the barriers to entry for new Facebook games are low and lots of new rival games appear on the social network every day.

The social game has more than 49.7 million monthly active users on Facebook, according to AppData. That makes it the No. 1 app by far. Ranked at No. 2 is FarmVille at 30.9 million and The Sims Social — which was the biggest threat to CityVille just a month or so ago — at No. 3 with 30.4 million users.

Electronic Arts’ The Sims Social started growing like weeds in August, but more recently it has slowed and CityVille has begun to widen its lead over the EA game.

Zynga says there are 1,482,404,157 neighbor connections that have happened in CityVille and 4.5 billion bandits have been captured.

CityVille has 41 percent male players and 53 percent female. (The rest are undetermined). The most popular CityVille cargo ship destination is Paris. Average CityVille sessions per player is five.